Texas Instruments DRV8801RTYT

Overview

DRV8801RTYT from Texas Instruments is a DMOS full-bridge motor driver IC for brushed DC motors, delivering ±2.8 A peak output current at 8–36 V supply voltage, featuring PHASE/ENABLE control interface, integrated charge pump, and real-time current sensing via VPROPI analog output. It supports fast/slow decay modes with MODE1/MODE2 inputs and operates in robotics, industrial automation, and printer motion systems.

For engineers reviewing the DRV8801RTYT datasheet, DRV8801RTYT pinout, DRV8801RTYT application, or DRV8801RTYT equivalent, key selection criteria include its 16-pin WQFN package with PowerPAD™, 0.48 Ω typical R_DS(on) at 25°C, thermal warning at 160°C, overcurrent trip at 3 A, and VPROPI's 5× gain for motor winding current monitoring.

Technical Context

The DRV8801RTYT implements an N-channel H-bridge with internal charge pump for high-side gate drive, enabling full bidirectional control without external high-voltage bias. Its dual-mode decay control (fast vs. slow) is configured via MODE1 and MODE2 pins, with MODE2 selecting high-side or low-side recirculation path during slow decay - a distinction absent in DRV8800.

Unlike the DRV8800, the DRV8801RTYT integrates VPROPI - an analog output proportional to SENSE voltage with 5 V/V gain - enabling direct ADC interfacing for closed-loop current regulation. Fault reporting is handled by open-drain nFAULT, active-low under UVLO, OCP, or thermal warning (160°C), but not during sleep mode.

Key Specifications

Pinout & Package

DRV8801RTYT is housed in a 4.00 mm × 4.00 mm, 16-pin WQFN package with exposed PowerPAD™ for enhanced thermal dissipation. The package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar brushed DC motor driver applications.

Compared with DRV8800RTYT, the DRV8801RTYT adds VPROPI and MODE2 for advanced current monitoring and decay-path control - essential for precision motion systems. Against TB6612FNG, it offers 2.3× higher voltage capability, 2.3× higher current, and integrated thermal warning - making it suitable for industrial 24 V applications where reliability and diagnostics are mandatory.

Availability

DRV8801RTYT is available at Aetrix Electronics and suitable for robotics, industrial automation, and medical device designs requiring stable component supply, long-term manufacturability, and compliance with RoHS and REACH standards.

Supply support for DRV8801RTYT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and high-reliability silicon solutions for industrial, automotive, and communications markets.

The DRV880x family was designed specifically for cost-sensitive, thermally constrained brushed DC motor control in industrial and consumer equipment - emphasizing integration (charge pump, protection, analog monitor), compact packaging (WQFN), and ease of controller interfacing (PHASE/ENABLE).

FAQ

What is the function of the VPROPI pin on the DRV8801RTYT?

The VPROPI pin on the DRV8801RTYT is an analog output proportional to the voltage across the SENSE resistor, with a fixed gain of 5 V/V. It enables direct connection to a microcontroller's ADC for real-time motor winding current measurement without external amplification. This feature is exclusive to the DRV8801RTYT and is not present on the DRV8800RTYT.

How does the DRV8801RTYT handle overcurrent conditions?

The DRV8801RTYT detects overcurrent via the SENSE pin and triggers a 3 A threshold, initiating a 1.2 ms fault retry timer (tOCP). During this period, outputs are disabled and nFAULT is driven low. After timeout, the device attempts recovery; if the fault persists, the cycle repeats. This behavior is documented in the Electrical Characteristics table and Protection Circuitry section of the DRV8801RTYT datasheet.

Can the DRV8801RTYT operate at 100% PWM duty cycle?

Yes, the DRV8801RTYT supports 100% PWM duty cycle operation due to its integrated charge pump, which generates gate drive voltage above VBB for the high-side N-channel MOSFETs. This eliminates reliance on bootstrap capacitor charging cycles, enabling continuous conduction mode essential for high-torque, low-speed motor applications.

What is the purpose of the MODE2 pin on the DRV8801RTYT?

The MODE2 pin on the DRV8801RTYT selects the recirculation path during slow-decay operation (when MODE1 = high). A logic high directs current through the high-side drivers; a logic low routes it through the low-side drivers. This capability - absent in DRV8800RTYT - allows optimization of power loss distribution and EMI profile based on system layout and thermal constraints.

Does the DRV8801RTYT require external components for charge pump operation?

Yes, the DRV8801RTYT requires two external 0.1 µF X7R ceramic capacitors: one between CP1 and CP2 (flying capacitor), and another between VCP and VBB (reservoir capacitor). These components are mandatory for proper charge pump function and high-side gate drive; omission results in driver failure or erratic output behavior.